; Sp. Pl. 1: 430 (1753)
Distribution: Temperate and subtropical Northern Hemisphere, especially Mexico (over 150), China (over 150), and Mediterranean, montane areas of tropics, Peru (1). The genus is very polyphyletic, with an option that only the type S. acre would belong in a monophyletic Sedum.
= Aithales Webb & Berthel.; Hist. Nat. Iles Canaries 3(2
= Aizopsis Grulich; Preslia 56: 35 (1984)
= Altamiranoa Rose; Bull. New York Bot. Gard. 2: 31 (1903)
= Amerosedum Á.Löve & D.Löve; Taxon 34: 350 (1985)
= Balfouria (H.Ohba) H.Ohba; H.´t Hart & U. Eggli (eds.), Evol. & Syst. Crassulac.: 156 (1995) (homonym)
= Breitungia Á.Löve & D.Löve; Taxon 34(2): 350 (1985)
= Cepaea Fabr.; Enum.: 147 (1759)
= Chamaerhodiola Nakai; Rep. Exped. Manchoukuo Sect. IV 1: 27 (1933)
= Chetyson Raf.; Ann. Gén. Sci. Phys. 7: 387 (1821)
= Clausenellia Á.Löve & D.Löve; Taxon 34(2): 350 (1985)
= Cockerellia (R.T.Clausen & C.H.Uhl) Á.Löve & D.Löve; Taxon 34(2): 351 (1985)
= Congdonia Jeps.; Man Fl. Pl. Calif. 450 (1925)
= Corynephyllum Rose; Britton et al. (eds.), N. Amer. Fl. 22: 28 (1905)
= Diamorpha Nutt.; Gen. N. Amer. Pl. 1: 293 (1818)
= Enchylus Ehrh.; Beitr. Naturk. Verw. Wiss. 4: 147 (1789)
= Etiosedum Á.Löve & D.Löve; Taxon 34(1): 163 (1985)
= Gormania Britton; Bull. N. York Bot. Gard. 3: 29 (1903)
= Helladia M.Král; Preslia 59(4): 309 (1987)
= Hjaltalinia Á.Löve & D.Löve; Taxon 34(1): 163 (1985) (nom. nov.)
= Keratolepis Rose ex Fröd.; Acta Hort. Gothob. 10: App., 55 (1936) (1935)
= Leucosedum Fourr.; Ann. Soc. Linn. Lyon, N. S. 16: 384 (1868)
= Macrosepalum Regel & Schmalh. ex Regel; Pl. Nov. Fedsch. 25 (1882)
= Monanthella A.Berger; Engl. & Prantl, Nat. Pflanzenfam. ed. 2, 18a: 446 (1930)
= Mucizonia (DC.) A.Berger; Engl., Nat. Pflanzenfam. ed. 2, 18a: 419 (1930)
= Ohbaea V.V.Byalt & I.V.Sokolova; Kew Bull. 54: 476 (1999)
= Oreosedum Grulich; Preslia 56(1): 41 (1984)
= Poenosedum Holub; Folia Geobot. Phytotax. 19(1): 98 (1984)
= Procrassula Griseb.; Spicil. Fl. Rumel. 1: 323 (1843)
= Sedastrum Rose; Britton et al. (eds.), N. Amer. Fl. 22: 58 (1905)
= Sempervivella Stapf; Bot. Mag. t. 8985 (1923)
= Spathulata (Boriss.) Á.Löve & D.Löve; Taxon 34: 163 (1985)
= Telmissa Fenzl; Pugill. Pl. Nov. Syr. 14 (1842)
= Tetradium Dulac; Fl. Hautes-Pyrénées: 321 (1867)
= Tetrorum Rose; N. Amer. Fl. 22: 59 (1905)
= Triactina Hook.f. & Thomson; J. Linn. Soc., Bot. 2: 90 (1858)
